mirror of
https://github.com/microsoft/TypeScript.git
synced 2026-05-17 01:49:57 -05:00
538 lines
28 KiB
TypeScript
538 lines
28 KiB
TypeScript
/// <reference path="parser.ts"/>
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module ts {
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/* @internal */ export var bindTime = 0;
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export const enum ModuleInstanceState {
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NonInstantiated = 0,
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Instantiated = 1,
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ConstEnumOnly = 2
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}
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export function getModuleInstanceState(node: Node): ModuleInstanceState {
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// A module is uninstantiated if it contains only
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// 1. interface declarations, type alias declarations
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if (node.kind === SyntaxKind.InterfaceDeclaration || node.kind === SyntaxKind.TypeAliasDeclaration) {
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return ModuleInstanceState.NonInstantiated;
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}
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// 2. const enum declarations don't make module instantiated
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else if (isConstEnumDeclaration(node)) {
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return ModuleInstanceState.ConstEnumOnly;
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}
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// 3. non - exported import declarations
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else if (node.kind === SyntaxKind.ImportDeclaration && !(node.flags & NodeFlags.Export)) {
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return ModuleInstanceState.NonInstantiated;
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}
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// 4. other uninstantiated module declarations.
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else if (node.kind === SyntaxKind.ModuleBlock) {
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var state = ModuleInstanceState.NonInstantiated;
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forEachChild(node, n => {
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switch (getModuleInstanceState(n)) {
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case ModuleInstanceState.NonInstantiated:
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// child is non-instantiated - continue searching
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return false;
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case ModuleInstanceState.ConstEnumOnly:
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// child is const enum only - record state and continue searching
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state = ModuleInstanceState.ConstEnumOnly;
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return false;
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case ModuleInstanceState.Instantiated:
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// child is instantiated - record state and stop
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state = ModuleInstanceState.Instantiated;
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return true;
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}
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});
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return state;
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}
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else if (node.kind === SyntaxKind.ModuleDeclaration) {
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return getModuleInstanceState((<ModuleDeclaration>node).body);
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}
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else {
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return ModuleInstanceState.Instantiated;
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}
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}
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/**
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* A declaration has a dynamic name if both of the following are true:
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* 1. The declaration has a computed property name
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* 2. The computed name is *not* expressed as Symbol.<name>, where name
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* is a property of the Symbol constructor that denotes a built in
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* Symbol.
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*/
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export function hasDynamicName(declaration: Declaration): boolean {
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return declaration.name && declaration.name.kind === SyntaxKind.ComputedPropertyName;
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}
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export function bindSourceFile(file: SourceFile): void {
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var start = new Date().getTime();
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bindSourceFileWorker(file);
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bindTime += new Date().getTime() - start;
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}
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function bindSourceFileWorker(file: SourceFile): void {
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var parent: Node;
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var container: Node;
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var blockScopeContainer: Node;
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var lastContainer: Node;
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var symbolCount = 0;
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var Symbol = objectAllocator.getSymbolConstructor();
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if (!file.locals) {
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file.locals = {};
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container = blockScopeContainer = file;
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bind(file);
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file.symbolCount = symbolCount;
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}
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function createSymbol(flags: SymbolFlags, name: string): Symbol {
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symbolCount++;
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return new Symbol(flags, name);
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}
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function addDeclarationToSymbol(symbol: Symbol, node: Declaration, symbolKind: SymbolFlags) {
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symbol.flags |= symbolKind;
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if (!symbol.declarations) symbol.declarations = [];
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symbol.declarations.push(node);
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if (symbolKind & SymbolFlags.HasExports && !symbol.exports) symbol.exports = {};
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if (symbolKind & SymbolFlags.HasMembers && !symbol.members) symbol.members = {};
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node.symbol = symbol;
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if (symbolKind & SymbolFlags.Value && !symbol.valueDeclaration) symbol.valueDeclaration = node;
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}
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// Should not be called on a declaration with a computed property name.
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function getDeclarationName(node: Declaration): string {
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if (node.name) {
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if (node.kind === SyntaxKind.ModuleDeclaration && node.name.kind === SyntaxKind.StringLiteral) {
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return '"' + (<LiteralExpression>node.name).text + '"';
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}
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Debug.assert(!hasDynamicName(node));
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return (<Identifier | LiteralExpression>node.name).text;
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}
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switch (node.kind) {
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case SyntaxKind.ConstructorType:
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case SyntaxKind.Constructor:
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return "__constructor";
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case SyntaxKind.FunctionType:
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case SyntaxKind.CallSignature:
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return "__call";
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case SyntaxKind.ConstructSignature:
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return "__new";
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case SyntaxKind.IndexSignature:
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return "__index";
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}
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}
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function getDisplayName(node: Declaration): string {
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return node.name ? declarationNameToString(node.name) : getDeclarationName(node);
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}
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function declareSymbol(symbols: SymbolTable, parent: Symbol, node: Declaration, includes: SymbolFlags, excludes: SymbolFlags): Symbol {
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Debug.assert(!hasDynamicName(node));
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var name = getDeclarationName(node);
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if (name !== undefined) {
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var symbol = hasProperty(symbols, name) ? symbols[name] : (symbols[name] = createSymbol(0, name));
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if (symbol.flags & excludes) {
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if (node.name) {
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node.name.parent = node;
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}
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// Report errors every position with duplicate declaration
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// Report errors on previous encountered declarations
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var message = symbol.flags & SymbolFlags.BlockScopedVariable
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? Diagnostics.Cannot_redeclare_block_scoped_variable_0
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: Diagnostics.Duplicate_identifier_0;
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forEach(symbol.declarations, declaration => {
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file.bindDiagnostics.push(createDiagnosticForNode(declaration.name, message, getDisplayName(declaration)));
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});
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file.bindDiagnostics.push(createDiagnosticForNode(node.name, message, getDisplayName(node)));
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symbol = createSymbol(0, name);
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}
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}
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else {
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symbol = createSymbol(0, "__missing");
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}
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addDeclarationToSymbol(symbol, node, includes);
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symbol.parent = parent;
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if (node.kind === SyntaxKind.ClassDeclaration && symbol.exports) {
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// TypeScript 1.0 spec (April 2014): 8.4
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// Every class automatically contains a static property member named 'prototype',
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// the type of which is an instantiation of the class type with type Any supplied as a type argument for each type parameter.
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// It is an error to explicitly declare a static property member with the name 'prototype'.
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var prototypeSymbol = createSymbol(SymbolFlags.Property | SymbolFlags.Prototype, "prototype");
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if (hasProperty(symbol.exports, prototypeSymbol.name)) {
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if (node.name) {
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node.name.parent = node;
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}
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file.bindDiagnostics.push(createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0],
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Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
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}
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symbol.exports[prototypeSymbol.name] = prototypeSymbol;
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prototypeSymbol.parent = symbol;
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}
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return symbol;
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}
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function isAmbientContext(node: Node): boolean {
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while (node) {
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if (node.flags & NodeFlags.Ambient) return true;
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node = node.parent;
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}
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return false;
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}
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function declareModuleMember(node: Declaration, symbolKind: SymbolFlags, symbolExcludes: SymbolFlags) {
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// Exported module members are given 2 symbols: A local symbol that is classified with an ExportValue,
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// ExportType, or ExportContainer flag, and an associated export symbol with all the correct flags set
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// on it. There are 2 main reasons:
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//
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// 1. We treat locals and exports of the same name as mutually exclusive within a container.
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// That means the binder will issue a Duplicate Identifier error if you mix locals and exports
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// with the same name in the same container.
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// TODO: Make this a more specific error and decouple it from the exclusion logic.
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// 2. When we checkIdentifier in the checker, we set its resolved symbol to the local symbol,
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// but return the export symbol (by calling getExportSymbolOfValueSymbolIfExported). That way
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// when the emitter comes back to it, it knows not to qualify the name if it was found in a containing scope.
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var exportKind = 0;
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if (symbolKind & SymbolFlags.Value) {
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exportKind |= SymbolFlags.ExportValue;
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}
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if (symbolKind & SymbolFlags.Type) {
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exportKind |= SymbolFlags.ExportType;
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}
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if (symbolKind & SymbolFlags.Namespace) {
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exportKind |= SymbolFlags.ExportNamespace;
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}
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if (getCombinedNodeFlags(node) & NodeFlags.Export || (node.kind !== SyntaxKind.ImportDeclaration && isAmbientContext(container))) {
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if (exportKind) {
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var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
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local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolKind, symbolExcludes);
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node.localSymbol = local;
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}
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else {
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declareSymbol(container.symbol.exports, container.symbol, node, symbolKind, symbolExcludes);
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}
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}
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else {
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declareSymbol(container.locals, undefined, node, symbolKind, symbolExcludes);
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}
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}
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// All container nodes are kept on a linked list in declaration order. This list is used by the getLocalNameOfContainer function
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// in the type checker to validate that the local name used for a container is unique.
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function bindChildren(node: Node, symbolKind: SymbolFlags, isBlockScopeContainer: boolean) {
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if (symbolKind & SymbolFlags.HasLocals) {
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node.locals = {};
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}
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var saveParent = parent;
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var saveContainer = container;
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var savedBlockScopeContainer = blockScopeContainer;
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parent = node;
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if (symbolKind & SymbolFlags.IsContainer) {
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container = node;
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if (lastContainer) {
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lastContainer.nextContainer = container;
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}
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lastContainer = container;
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}
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if (isBlockScopeContainer) {
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blockScopeContainer = node;
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}
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forEachChild(node, bind);
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container = saveContainer;
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parent = saveParent;
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blockScopeContainer = savedBlockScopeContainer;
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}
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function bindDeclaration(node: Declaration, symbolKind: SymbolFlags, symbolExcludes: SymbolFlags, isBlockScopeContainer: boolean) {
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switch (container.kind) {
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case SyntaxKind.ModuleDeclaration:
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declareModuleMember(node, symbolKind, symbolExcludes);
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break;
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case SyntaxKind.SourceFile:
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if (isExternalModule(<SourceFile>container)) {
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declareModuleMember(node, symbolKind, symbolExcludes);
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break;
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}
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case SyntaxKind.FunctionType:
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case SyntaxKind.ConstructorType:
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case SyntaxKind.CallSignature:
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case SyntaxKind.ConstructSignature:
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case SyntaxKind.IndexSignature:
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case SyntaxKind.MethodDeclaration:
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case SyntaxKind.MethodSignature:
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case SyntaxKind.Constructor:
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case SyntaxKind.GetAccessor:
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case SyntaxKind.SetAccessor:
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case SyntaxKind.FunctionDeclaration:
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case SyntaxKind.FunctionExpression:
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case SyntaxKind.ArrowFunction:
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declareSymbol(container.locals, undefined, node, symbolKind, symbolExcludes);
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break;
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case SyntaxKind.ClassDeclaration:
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if (node.flags & NodeFlags.Static) {
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declareSymbol(container.symbol.exports, container.symbol, node, symbolKind, symbolExcludes);
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break;
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}
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case SyntaxKind.TypeLiteral:
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case SyntaxKind.ObjectLiteralExpression:
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case SyntaxKind.InterfaceDeclaration:
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declareSymbol(container.symbol.members, container.symbol, node, symbolKind, symbolExcludes);
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break;
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case SyntaxKind.EnumDeclaration:
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declareSymbol(container.symbol.exports, container.symbol, node, symbolKind, symbolExcludes);
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break;
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}
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bindChildren(node, symbolKind, isBlockScopeContainer);
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}
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function bindModuleDeclaration(node: ModuleDeclaration) {
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if (node.name.kind === SyntaxKind.StringLiteral) {
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bindDeclaration(node, SymbolFlags.ValueModule, SymbolFlags.ValueModuleExcludes, /*isBlockScopeContainer*/ true);
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}
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else {
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var state = getModuleInstanceState(node);
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if (state === ModuleInstanceState.NonInstantiated) {
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bindDeclaration(node, SymbolFlags.NamespaceModule, SymbolFlags.NamespaceModuleExcludes, /*isBlockScopeContainer*/ true);
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}
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else {
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bindDeclaration(node, SymbolFlags.ValueModule, SymbolFlags.ValueModuleExcludes, /*isBlockScopeContainer*/ true);
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if (state === ModuleInstanceState.ConstEnumOnly) {
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// mark value module as module that contains only enums
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node.symbol.constEnumOnlyModule = true;
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}
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else if (node.symbol.constEnumOnlyModule) {
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// const only value module was merged with instantiated module - reset flag
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node.symbol.constEnumOnlyModule = false;
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}
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}
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}
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}
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function bindFunctionOrConstructorType(node: SignatureDeclaration) {
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// For a given function symbol "<...>(...) => T" we want to generate a symbol identical
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// to the one we would get for: { <...>(...): T }
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//
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// We do that by making an anonymous type literal symbol, and then setting the function
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// symbol as its sole member. To the rest of the system, this symbol will be indistinguishable
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// from an actual type literal symbol you would have gotten had you used the long form.
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var symbol = createSymbol(SymbolFlags.Signature, getDeclarationName(node));
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addDeclarationToSymbol(symbol, node, SymbolFlags.Signature);
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bindChildren(node, SymbolFlags.Signature, /*isBlockScopeContainer:*/ false);
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var typeLiteralSymbol = createSymbol(SymbolFlags.TypeLiteral, "__type");
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addDeclarationToSymbol(typeLiteralSymbol, node, SymbolFlags.TypeLiteral);
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typeLiteralSymbol.members = {};
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typeLiteralSymbol.members[node.kind === SyntaxKind.FunctionType ? "__call" : "__new"] = symbol
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}
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function bindAnonymousDeclaration(node: Declaration, symbolKind: SymbolFlags, name: string, isBlockScopeContainer: boolean) {
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var symbol = createSymbol(symbolKind, name);
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addDeclarationToSymbol(symbol, node, symbolKind);
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bindChildren(node, symbolKind, isBlockScopeContainer);
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}
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function bindCatchVariableDeclaration(node: CatchClause) {
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var symbol = createSymbol(SymbolFlags.FunctionScopedVariable, node.name.text || "__missing");
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addDeclarationToSymbol(symbol, node, SymbolFlags.FunctionScopedVariable);
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var saveParent = parent;
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var savedBlockScopeContainer = blockScopeContainer;
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parent = blockScopeContainer = node;
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forEachChild(node, bind);
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parent = saveParent;
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blockScopeContainer = savedBlockScopeContainer;
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}
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function bindBlockScopedVariableDeclaration(node: Declaration) {
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switch (blockScopeContainer.kind) {
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case SyntaxKind.ModuleDeclaration:
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declareModuleMember(node, SymbolFlags.BlockScopedVariable, SymbolFlags.BlockScopedVariableExcludes);
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break;
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case SyntaxKind.SourceFile:
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if (isExternalModule(<SourceFile>container)) {
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declareModuleMember(node, SymbolFlags.BlockScopedVariable, SymbolFlags.BlockScopedVariableExcludes);
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break;
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}
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default:
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if (!blockScopeContainer.locals) {
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blockScopeContainer.locals = {};
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}
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declareSymbol(blockScopeContainer.locals, undefined, node, SymbolFlags.BlockScopedVariable, SymbolFlags.BlockScopedVariableExcludes);
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}
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bindChildren(node, SymbolFlags.BlockScopedVariable, /*isBlockScopeContainer*/ false);
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}
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function getDestructuringParameterName(node: Declaration) {
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return "__" + indexOf((<SignatureDeclaration>node.parent).parameters, node);
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}
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function bind(node: Node) {
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node.parent = parent;
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switch (node.kind) {
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case SyntaxKind.TypeParameter:
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bindDeclaration(<Declaration>node, SymbolFlags.TypeParameter, SymbolFlags.TypeParameterExcludes, /*isBlockScopeContainer*/ false);
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break;
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case SyntaxKind.Parameter:
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bindParameter(<ParameterDeclaration>node);
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break;
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case SyntaxKind.VariableDeclaration:
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case SyntaxKind.BindingElement:
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if (isBindingPattern((<Declaration>node).name)) {
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bindChildren(node, 0, /*isBlockScopeContainer*/ false);
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}
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else if (getCombinedNodeFlags(node) & NodeFlags.BlockScoped) {
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bindBlockScopedVariableDeclaration(<Declaration>node);
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}
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else {
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bindDeclaration(<Declaration>node, SymbolFlags.FunctionScopedVariable, SymbolFlags.FunctionScopedVariableExcludes, /*isBlockScopeContainer*/ false);
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}
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break;
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case SyntaxKind.PropertyDeclaration:
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case SyntaxKind.PropertySignature:
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bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.Property | ((<PropertyDeclaration>node).questionToken ? SymbolFlags.Optional : 0), SymbolFlags.PropertyExcludes, /*isBlockScopeContainer*/ false);
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break;
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case SyntaxKind.PropertyAssignment:
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case SyntaxKind.ShorthandPropertyAssignment:
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bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.Property, SymbolFlags.PropertyExcludes, /*isBlockScopeContainer*/ false);
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break;
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case SyntaxKind.EnumMember:
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bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.EnumMember, SymbolFlags.EnumMemberExcludes, /*isBlockScopeContainer*/ false);
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break;
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case SyntaxKind.CallSignature:
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case SyntaxKind.ConstructSignature:
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case SyntaxKind.IndexSignature:
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bindDeclaration(<Declaration>node, SymbolFlags.Signature, 0, /*isBlockScopeContainer*/ false);
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break;
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case SyntaxKind.MethodDeclaration:
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case SyntaxKind.MethodSignature:
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// If this is an ObjectLiteralExpression method, then it sits in the same space
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// as other properties in the object literal. So we use SymbolFlags.PropertyExcludes
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// so that it will conflict with any other object literal members with the same
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// name.
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bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.Method | ((<MethodDeclaration>node).questionToken ? SymbolFlags.Optional : 0),
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isObjectLiteralMethod(node) ? SymbolFlags.PropertyExcludes : SymbolFlags.MethodExcludes, /*isBlockScopeContainer*/ true);
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break;
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case SyntaxKind.FunctionDeclaration:
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bindDeclaration(<Declaration>node, SymbolFlags.Function, SymbolFlags.FunctionExcludes, /*isBlockScopeContainer*/ true);
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break;
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case SyntaxKind.Constructor:
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bindDeclaration(<Declaration>node, SymbolFlags.Constructor, /*symbolExcludes:*/ 0, /*isBlockScopeContainer:*/ true);
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break;
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case SyntaxKind.GetAccessor:
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bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.GetAccessor, SymbolFlags.GetAccessorExcludes, /*isBlockScopeContainer*/ true);
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break;
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case SyntaxKind.SetAccessor:
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bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.SetAccessor, SymbolFlags.SetAccessorExcludes, /*isBlockScopeContainer*/ true);
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break;
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case SyntaxKind.FunctionType:
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case SyntaxKind.ConstructorType:
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bindFunctionOrConstructorType(<SignatureDeclaration>node);
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break;
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case SyntaxKind.TypeLiteral:
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bindAnonymousDeclaration(<TypeLiteralNode>node, SymbolFlags.TypeLiteral, "__type", /*isBlockScopeContainer*/ false);
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break;
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case SyntaxKind.ObjectLiteralExpression:
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bindAnonymousDeclaration(<ObjectLiteralExpression>node, SymbolFlags.ObjectLiteral, "__object", /*isBlockScopeContainer*/ false);
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break;
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case SyntaxKind.FunctionExpression:
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case SyntaxKind.ArrowFunction:
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bindAnonymousDeclaration(<FunctionExpression>node, SymbolFlags.Function, "__function", /*isBlockScopeContainer*/ true);
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break;
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case SyntaxKind.CatchClause:
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bindCatchVariableDeclaration(<CatchClause>node);
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break;
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case SyntaxKind.ClassDeclaration:
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bindDeclaration(<Declaration>node, SymbolFlags.Class, SymbolFlags.ClassExcludes, /*isBlockScopeContainer*/ false);
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break;
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case SyntaxKind.InterfaceDeclaration:
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bindDeclaration(<Declaration>node, SymbolFlags.Interface, SymbolFlags.InterfaceExcludes, /*isBlockScopeContainer*/ false);
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break;
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case SyntaxKind.TypeAliasDeclaration:
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bindDeclaration(<Declaration>node, SymbolFlags.TypeAlias, SymbolFlags.TypeAliasExcludes, /*isBlockScopeContainer*/ false);
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break;
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case SyntaxKind.EnumDeclaration:
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if (isConst(node)) {
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bindDeclaration(<Declaration>node, SymbolFlags.ConstEnum, SymbolFlags.ConstEnumExcludes, /*isBlockScopeContainer*/ false);
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}
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else {
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bindDeclaration(<Declaration>node, SymbolFlags.RegularEnum, SymbolFlags.RegularEnumExcludes, /*isBlockScopeContainer*/ false);
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}
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break;
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case SyntaxKind.ModuleDeclaration:
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bindModuleDeclaration(<ModuleDeclaration>node);
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break;
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case SyntaxKind.ImportDeclaration:
|
|
bindDeclaration(<Declaration>node, SymbolFlags.Import, SymbolFlags.ImportExcludes, /*isBlockScopeContainer*/ false);
|
|
break;
|
|
case SyntaxKind.SourceFile:
|
|
if (isExternalModule(<SourceFile>node)) {
|
|
bindAnonymousDeclaration(<SourceFile>node, SymbolFlags.ValueModule, '"' + removeFileExtension((<SourceFile>node).fileName) + '"', /*isBlockScopeContainer*/ true);
|
|
break;
|
|
}
|
|
case SyntaxKind.Block:
|
|
// do not treat function block a block-scope container
|
|
// all block-scope locals that reside in this block should go to the function locals.
|
|
// Otherwise this won't be considered as redeclaration of a block scoped local:
|
|
// function foo() {
|
|
// let x;
|
|
// var x;
|
|
// }
|
|
// 'var x' will be placed into the function locals and 'let x' - into the locals of the block
|
|
bindChildren(node, 0, /*isBlockScopeContainer*/ !isAnyFunction(node.parent));
|
|
break;
|
|
case SyntaxKind.CatchClause:
|
|
case SyntaxKind.ForStatement:
|
|
case SyntaxKind.ForInStatement:
|
|
case SyntaxKind.SwitchStatement:
|
|
bindChildren(node, 0, /*isBlockScopeContainer*/ true);
|
|
break;
|
|
default:
|
|
var saveParent = parent;
|
|
parent = node;
|
|
forEachChild(node, bind);
|
|
parent = saveParent;
|
|
}
|
|
}
|
|
|
|
function bindParameter(node: ParameterDeclaration) {
|
|
if (isBindingPattern(node.name)) {
|
|
bindAnonymousDeclaration(node, SymbolFlags.FunctionScopedVariable, getDestructuringParameterName(node), /*isBlockScopeContainer*/ false);
|
|
}
|
|
else {
|
|
bindDeclaration(node, SymbolFlags.FunctionScopedVariable, SymbolFlags.ParameterExcludes, /*isBlockScopeContainer*/ false);
|
|
}
|
|
|
|
// If this is a property-parameter, then also declare the property symbol into the
|
|
// containing class.
|
|
if (node.flags & NodeFlags.AccessibilityModifier &&
|
|
node.parent.kind === SyntaxKind.Constructor &&
|
|
node.parent.parent.kind === SyntaxKind.ClassDeclaration) {
|
|
|
|
var classDeclaration = <ClassDeclaration>node.parent.parent;
|
|
declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, SymbolFlags.Property, SymbolFlags.PropertyExcludes);
|
|
}
|
|
}
|
|
|
|
function bindPropertyOrMethodOrAccessor(node: Declaration, symbolKind: SymbolFlags, symbolExcludes: SymbolFlags, isBlockScopeContainer: boolean) {
|
|
if (hasDynamicName(node)) {
|
|
bindAnonymousDeclaration(node, symbolKind, "__computed", isBlockScopeContainer);
|
|
}
|
|
else {
|
|
bindDeclaration(node, symbolKind, symbolExcludes, isBlockScopeContainer);
|
|
}
|
|
}
|
|
}
|
|
}
|